If you ______ go, at least wait the storm is over. [ ]
A. can
B. may
C. must
D. will
答案:C
100mL 0.5mol/L NaOH溶液加水稀释到500mL,稀释后NaOH的物质的量浓度( )
A.0.01mol/L
B.0.1mol/L
C.0.05mol/L
D.0.04mol/L
1mm2<=S<2mm2的中等颗粒在车身外部1区的零部件上分散地出现6个以上,应当扣()级缺陷。
A、A
B、B
C、C
D、D